Question

A fighter aircraft is looping in a vertical plane. The minimum velocity at the highest point is (Given, r = radius of the loop)

• A. $\sqrt{\frac{1}{2}gr}$
• B. $\sqrt{2gr}$
• C. $\sqrt{gr}$
• D. $\sqrt{3gr}$
• E. $\sqrt{4gr}$

Answer 1

Answer: (C)

$mg=\frac{m{v}^2}{r}$
$v^2=gr$
$v=\sqrt{gr}$